Update help rendering to add '...' suffix per-arg based on the
`multiple` property, instead of only using command-level `strict === false`.
The existing strict===false behavior is preserved as a fallback for
backward compatibility.

Rewrites _args() in parse.ts to support variadic args using a
shift/pop algorithm: pre-variadic args consume from the front,
post-variadic args consume from the back, and everything remaining
goes to the variadic arg as an array. Also updates validate.ts to
skip UnexpectedArgsError when a variadic arg is present.

Add TypeScript overloads to ArgDefinition so that Args.string({ multiple: true })
correctly types the return as Arg<T[]> instead of Arg<T>. This mirrors how
FlagDefinition handles multiple: true with its overloads.

Break apart _args() by extracting parseArgInput, applyDefault, and
tryStdin helpers. Inline the variadic path instead of a separate method
to avoid passing 7 parameters. Remove "original logic" comments.

Verify that variadic args show ... suffix in USAGE line:
- last position, first with trailing required, middle position
- optional variadic shows [FILES...]
- non-variadic siblings don't get the suffix

The cacheArgs function wasn't including the `multiple` property when
caching arg metadata, which caused help text to miss the `...` suffix
for variadic args when loaded from the manifest cache.

Verify that the shift/pop parsing algorithm correctly handles flags
placed between positional arguments in various configurations:
leading required + variadic, variadic + trailing required, both,
and boolean flags mixed in.

Bumps [eslint-config-oclif](https://github.com/oclif/eslint-config-oclif) from 6.0.146 to 6.0.148.
- [Release notes](https://github.com/oclif/eslint-config-oclif/releases)
- [Changelog](https://github.com/oclif/eslint-config-oclif/blob/main/CHANGELOG.md)
- [Commits](oclif/eslint-config-oclif@6.0.146...6.0.148)

---
updated-dependencies:
- dependency-name: eslint-config-oclif
  dependency-version: 6.0.148
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

…nfig-oclif-6.0.148

chore(dev-deps): bump eslint-config-oclif from 6.0.146 to 6.0.148

feat: support variadic args natively